| Name | Attribute | Level | Type |
|---|---|---|---|
| Ice Ball | 103 | General Monster | |
| Ice Ball | 103 | General Monster | |
| Icy Cherry Bug | 75 | General Monster | |
| Icy Scaled Lion | 78 | General Monster | |
| Iguana Priest | 83 | General Monster | |
| Iguana Priest | 85 | General Monster | |
| Immortal Guard | 76 | General Monster | |
| Imperial Phalanx | 68 | General Monster | |
| Imperial Phalanx | 63 | General Monster | |
| Imperial Phalanx | 63 | General Monster | |
| Imperial Phalanx | 63 | General Monster | |
| Imperial Ruby Sorceress | 68 | General Monster | |
| Imperial Ruby Sorceress | 63 | General Monster | |
| Imperial Ruby Sorceress | 63 | General Monster | |
| Imperial Ruby Sorceress | 68 | General Monster | |
| Imperial Ruby Sorceress | 63 | General Monster | |
| Imperial Ruby Sorceress | 63 | General Monster | |
| Imperial Ruby Sorceress | 63 | General Monster | |
| Imperial Ruby Sorceress | 63 | General Monster | |
| Imperial Tomb Clay Figurine | 136 | General Monster | |
| Imperial Tomb Clay Figurine | 136 | General Monster | |
| Imperial Tomb Mechanism | - | 165 | General Monster |
| Imperial Tomb Mechanism | - | 165 | General Monster |
| Imperial Tomb Statues | 141 | General Monster | |
| Imperial Tomb Statues | 141 | General Monster | |
| Impish Sprite | 39 | General Monster | |
| Impish Sprite | - | 39 | General Monster |
| Infernal Bomb | - | 55 | General Monster |
| Infernal Bomb | - | 55 | General Monster |
| Infernal Force | - | 58 | General Monster |
| Infernal Kormorant Lord | - | 8 | General Monster |
| Inferno Force | - | 58 | General Monster |
| Inferno Force | - | 38 | General Monster |
| Inferno Force | - | 58 | General Monster |
| Inferno Force | - | 38 | General Monster |
| Inferno Force | - | 58 | General Monster |
| Inferno Force | - | 38 | General Monster |
| Inferno Force | - | 38 | General Monster |
| Inferno Force | - | 61 | General Monster |
| Inferno Sprite | 55 | General Monster | |
| Inferno Sprite | 55 | General Monster | |
| Invisible Blue Lizard | 85 | General Monster | |
| Invisible Blue Lizard | 83 | General Monster | |
| Invisible Blue Lizard | 83 | General Monster | |
| Invisible Blue Lizard | 85 | General Monster | |
| Invisible Creatures of Death | - | 1 | General Monster |
| Invisible Creatures of Dim Light | - | 1 | General Monster |
| Invisible Creatures of Dim Light | - | 1 | General Monster |
| Invisible Creatures with Special Effects | - | 1 | General Monster |
| Invisible Monster | - | 99 | General Monster |